diff --git a/client/drivers/w5100_udp.s b/client/drivers/w5100_udp.s
deleted file mode 100644
index 652fcf0..0000000
--- a/client/drivers/w5100_udp.s
+++ /dev/null
@@ -1,268 +0,0 @@
-;UDP (user datagram protocol) functions
-
-.include "../inc/common.i"
-.ifndef KPR_API_VERSION_NUMBER
-  .define EQU     =
-  .include "../inc/kipper_constants.i"
-.endif
-
-	;.import dbg_dump_udp_header
-
-  .import ip65_error
-
-	.export udp_init
-	.export udp_process
-	.export udp_add_listener
-	.export udp_remove_listener
-	.export udp_send
-
-	.export udp_callback
-
-	.export udp_inp
-	.export udp_outp
-	.import eth_inp
-	.import eth_outp
-
-	.exportzp udp_src_port
-	.exportzp udp_dest_port
-	.exportzp udp_len
-	.exportzp udp_cksum
-	.exportzp udp_data
-
-	.export udp_send_dest
-	.export udp_send_src_port
-	.export udp_send_dest_port
-	.export udp_send_len
-
-
-	.import copymem
-	.importzp copy_src
-	.importzp copy_dest
-
-	.import cfg_ip
-  
-  .data
-  udp_cbtmp:	jmp $ffff			; temporary vector - gets filled in later
-
-	.bss
-
-; argument for udp_add_listener
-udp_callback:	.res 2  ;vector to routine to be called when a udp packet arrives
-
-; arguments for udp_send
-udp_send_dest:		.res 4  ;set to ip address that udp packet will be sent to
-udp_send_src_port:	.res 2 ;set to port that udp packet will be sent from
-udp_send_dest_port:	.res 2 ;set to port that udp packet will be sent to
-udp_send_len:		.res 2 ;set to length of data to be sent in udp packet (excluding ethernet,ip & udp headers)
-
-; udp listener callbacks
-udp_cbmax	= 4
-udp_cbveclo:	.res udp_cbmax		; table of listener vectors (lsb)
-udp_cbvechi:	.res udp_cbmax		; table of listener vectors (msb)
-udp_cbportlo:	.res udp_cbmax		; table of ports (lsb)
-udp_cbporthi:	.res udp_cbmax		; table of ports (msb)
-udp_cbcount:	.res 1			; number of active listeners
-
-; udp packet offsets
-udp_inp		= eth_inp 
-udp_outp	= eth_outp 
-udp_src_port	= 0 ;offset of source port field in udp packet
-udp_dest_port	= 2 ;offset of destination port field in udp packet
-udp_len		= 4 ;offset of length field in udp packet
-udp_cksum	= 6 ;offset of checksum field in udp packet
-udp_data	= 8 ;offset of data in udp packet
-
-; virtual header
-udp_vh		= udp_outp - 12
-udp_vh_src	= 0
-udp_vh_dest	= 4
-udp_vh_zero	= 8
-udp_vh_proto	= 9
-udp_vh_len	= 10
-
-
-; temp for port comparison
-port:   	.res 2
-
-
-	.code
-
-; initialize udp
-; inputs: none
-; outputs: none
-udp_init:
-	lda #0
-	sta udp_cbcount
-	rts
-
-
-;process incoming udp packet
-;inputs:
-; eth_inp: should contain an ethernet frame encapsulating an inbound udp packet
-;outputs:
-; carry flag set if any error occured (including if no handler for specified port
-;  was found)
-; carry flag clear if no error
-; if handler was found, an outbound message may be created, overwriting eth_outp
-
-udp_process:
-	lda udp_cbcount			; any installed udp listeners?
-	beq @drop
-
-	tax				; check ports
-	dex
-@checkport:
-	lda udp_cbportlo,x
-	cmp udp_inp + udp_dest_port + 1
-	bne :+
-	lda udp_cbporthi,x
-	cmp udp_inp + udp_dest_port
-	beq @handle
-:	dex
-	bpl @checkport
-
-@drop:
-  lda #KPR_ERROR_NO_SUCH_LISTENER
-  sta  ip65_error
-  sec
-	rts
-
-@handle:
-	lda udp_cbveclo,x		; copy vector
-	sta udp_cbtmp + 1
-	lda udp_cbvechi,x
-	sta udp_cbtmp + 2
-	jsr udp_cbtmp			; call listener
-	clc
-	rts
-
-
-;add a udp listener
-;inputs:
-; udp_callback: vector to call when udp packet arrives on specified port
-; AX: set to udp port to listen on
-;outputs:
-; carry flag set if too may listeners already installed, clear otherwise
-udp_add_listener:
-	sta port
-	stx port + 1
-
-	ldy udp_cbcount			; any listeners at all?
-	beq @add
-	cpy #udp_cbmax			; max?
-	beq @full
-	ldy #0
-@check:
-	lda udp_cbportlo,y		; check if port is already handled
-	cmp port
-	bne :+
-	lda udp_cbporthi,y
-	cmp port + 1
-	beq @busy
-:	iny
-	cpy udp_cbcount
-	bne @check
-@add:
-	inc udp_cbcount			; increase counter
-	sta udp_cbportlo,y		; add port
-	txa
-	sta udp_cbporthi,y		; add port
-	lda udp_callback		; and vector
-	sta udp_cbveclo,y
-	lda udp_callback + 1
-	sta udp_cbvechi,y
-
-	clc
-	rts
-@full:
-@busy:
-  lda #KPR_ERROR_LISTENER_NOT_AVAILABLE
-  sta  ip65_error
-  sec
-	sec
-	rts
-
-
-; remove an udp listener
-; inputs:
-; AX = port to stop listening on
-; outputs:
-; carry flag clear of handler found and removed
-; carry flag set if handler for specified port not found
-udp_remove_listener:
-	sta port
-	stx port + 1
-
-	ldy udp_cbcount			; any listeners installed?
-	beq @notfound
-  dey
-@check:
-	lda udp_cbportlo,y		; check if port is handled
-	cmp port
-	bne :+	
-	lda udp_cbporthi,y
-	cmp port + 1
-	beq @remove
-:	dey
-	bpl @check
-@notfound:
-	sec
-	rts
-@remove:
-	tya				; number of listeners below
-	eor #$ff
-	clc
-	adc udp_cbcount
-	beq @done
-@move:
-	tax				; number of items to move
-:	lda udp_cbportlo + 1,y		; move ports
-	sta udp_cbportlo,y
-	lda udp_cbporthi + 1,y
-	sta udp_cbporthi,y
-	lda udp_cbveclo + 1,y		; move vectors
-	sta udp_cbveclo,y
-	lda udp_cbvechi + 1,y
-	sta udp_cbvechi,y
-	iny
-	dex
-	bne :-
-@done:
-	dec udp_cbcount		; decrement counter
-	clc
-	rts
-
-
-;send udp packet
-;inputs:
-;   udp_send_dest:  destination ip address (4 bytes)
-;   udp_send_dest_port: destination port (2 bytes)
-;   udp_send_src_port: source port (2 bytes)
-;   udp_send_len: length of data to send (exclusive of any headers)
-;   AX: pointer to buffer containing data to be sent
-;outputs:
-;   carry flag is set if an error occured, clear otherwise
-udp_send:
-	stax copy_src			; copy data to output buffer
-	rts;FIXME
-
-
-
-;-- LICENSE FOR w5100_udp.s --
-; The contents of this file are subject to the Mozilla Public License
-; Version 1.1 (the "License"); you may not use this file except in
-; compliance with the License. You may obtain a copy of the License at
-; http://www.mozilla.org/MPL/
-; 
-; Software distributed under the License is distributed on an "AS IS"
-; basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-; License for the specific language governing rights and limitations
-; under the License.
-; 
-; The Original Code is ip65.
-; 
-; The Initial Developer of the Original Code is Jonno Downes,
-; jonno@jamtronix.com.
-; Portions created by the Initial Developer are Copyright (C) 2010
-; Jonno Downes. All Rights Reserved.  
-; -- LICENSE END --